I have run a hard ( for me) HM and a hard (for me) 10K over the past 3 weekends. I am intending to start to follow a HR training plan for a couple of months - which does a lot of easy running only - with a bit of HR based fartlekking I was going to start this week - but have decided that I am quite tired - so have now decided to take a complete week off doing nothing at all!! Not even any "cross training" .